Guiding of belts in high-draft mechanisms



Nov. 23, 1937. F. cAsABLANcAs 2,099,970

GUIDING 0F BELTS .TN HIGH DRAFT MECHANISM Filed Sept. 8, 1936 2 Sheets-Sheet l Nov. 23, 1937. F CASABLANCAS 2,099,970

GUIDING OF BELTS IN HIGH DRAFT MECHANISM Filed Sept. 8, 1956 2 Sheets-Sheet 2 lglform 1].57

Patented Nov. 23, 1937 UNITED STATES PATENT GFFICE Fernando Casablancas, Lausanne, Switzerland Application September 8, 1936, Serial N0. 99,823

In Spain September 20, 1935 8 Claims.

In high-draft mechanisms working with endless belts, difficulties are sometimes encountered in obtaining a correct movement of the belts without lateral deviation, particularly when these belts are of relatively great width, as in the case of drawing frames and other spinning mecha- 5 nisms.

When the belts are of small width, as is generally the case in continuous spinning machines, for correctly guiding the belts the usual frame formed by two lateral plates conveniently connected together and resting on the same cylinders as carry the belts, are generally suicient; the said plates guide the belts laterally so as to prevent displacement thereof, and support a number of guide rods which guide the belts by the curve which they form at the front. On the other hand, when use is made of belts of relatively great width, as is particularly the case in drawing frames, this frame is generally not suicient to guide the belts suitably and it occurs that, owing to the differences in thickness and hardness of the material of which the belts are made, the latter are deformed or lengthened more on one side than on the other and are inclined or displaced from their correct position, the lateral plates of the frame not being sucient to prevent this displacement of the belts. In some cases, this displacement reaches such a degree that the friction between the edge of the belt and the plate of the frame not only wears away the belt, but also the plate. l

The present invention relates to improvements in the guide rods 'of the belts and in the manner 3 of mounting these guide rods with the object of bringing it about that when the belt is inclined the guide rod automatically compensates for the deviation of the belt.

These improvements consist in mounting the guide rods of the front curve of the belts in such a manner that they may oscillate or be inclined with respect to their normal position in order to compensate for any lateral displacement or stretching of the belts. To this end, each guide 45 rod is preferably constructed of two parts, one of which ts into the frame in the usual manner and remains xed during the operation of the machine, while the other part is mounted on the first part and may have an oscillatory move- 50 ment, it being the latter which actually guides the belt. By reason of this arrangement, the movable part of the guide rod may be inclined to a greater or lesser extent while oscillating on the xed part. 55 In the simpler form of construction, the

stretching of the belt produces the inclination of the guide rod which automatically compensates for this stretching, and in other forms of construction there are combined with the movable part of the guide rod, contact members and parts which are actuated by the belt when a lateral displacement is set up therein and thus bring about the inclination of the guide rod in order to compensate for this lateral displacement and to cause the belt to return to the correct posi- 10 tion.

Various constructional forms of the oscillating guide rods according to the present invention are illustrated in the accompanying drawings, in which: l5

Figure l is a central vertical section of the two belts provided with oscillating guide rods according to this invention,

Figure 2 is a longitudinal section of the same on the une n n of Figure 1.

Figure 3 is a detail View from above of a guide rod,

Figure Llis a view from above of another constructional form of the oscillating guide rod,

Figure 5 is a section of this guide rod on the `25 line V-V oi' Figure 4,

Figure 6 is a similar view to Figure 4, but indicating how the guide rod oscillates upon displacement of the belt,

Figure 7 is a View from above of a third form of 30 construction seen in the direction of the arrow VII of Figure 8 and Figure 8 is a cross section on the line VIII-VIII of Figure 7.

In the constructional form illustrated in Figures l to 3, l and 2 designate the two cylinders actuating the belts 3 and 4 in the known manner, the said belts being guided at the front part by means of guide rods introduced into the curve of the belts, which are designated in Figure 1 by 5. 40

Each of these guide rods 5 is formed of two parts, as is shown in particular in Figure 3. The part 1 forms a plane guide rod, which ts into grooves in the lateral plates 6 of the frame in the known manner, and remains fixed during the operation of the mechanism. This rod 1 is, according to the invention enclosed by an outer rod 8 of U-shaped section, which is articulated to the rod l by a pin 9.

Owing to this arrangement, the fixed rod 'l re- 50 maining iXed in the grooves of the lateral plates 6 of the frame, the outer rod 8 constituting the actual guide of the belt may oscillate and turns about the pin 9, taking up a more or less inclined position which is thus automatically adapted to lated to the rod l as in the previous case, is pro-4 vided with two apertures lil inclined in opposite directions, into which areintrcduced pins l I `se cured to the inner rod 'l in such a manner that upon sliding of the rod 8 in the lateral direction the inclination of the two slots lll forces this rod 8 to be inclined as shown in Figure 6.

In combination with this arrangement the outer rod Il has at its extremities lateral projections l2, as shown in Figure 5, with which the' j lateral edge of theV belt l lightlyc'omesV into contact, so that when for any reason the belt is dis'- placed'laterally as shown in Figure 6, it causes the rod 8 to'be shifted laterally and consequently the slots I cause this rod to be inclined and to take up a position which arrests the displacement of the belt and tends vto centre it.

In Figures 7 and 8, a third form of construction is shown, in which the rodf l fits into recesses in the frame 6Y and is also enclosed by an'outer rod or casing 8 of U-shaped section, the said casing 8 being articulated to the rod 'l by a central pin 9, as in Figures 1 to 3.

VIn order to ydetermine the inclination' of' this rod 8, there is in this case disposed on each-side ofthe frame'a disc or sector I4 adapted to rotate about la" spindle or' pin l5in the'frame and disposed in such a manner that if the belt y3 is displaced its edge touches thev sector I4 and causes it to rotate. 'Ihissector i4 iscoupled by a connecting rod'l with the oscillating'V rod 8.

In this arrangement, it is also brought about that upon lateral displacement the belt Satouches the sectorl'on Vone side or'the other and 'causes it to rotate, whereupon 'this sector, through'ithe intermediary of the connecting rod" I6, causes the oter'rod '3 to oscillate and take up'an inclined lposition which arrests the lateral deviation of the belt and tends to re-centre' it.

In theV drawings, it has been assumed that the rod 'l is of solid section andthe movable rod 8 is of stamped sheet metal of U-shaped section partially embracingthe ixed rod 1.

What I claim is:

1. In a high-draft mechanism for textile bres the combination of endless belts, cylinders for actuating said belts, a guiding frame, lateral plates in the said frame, guide rods introduced into the front curve of the belts, and belt engaging rods articulated to said guide rods and adapted to oscillate with respect to their normal position in order to compensate for the stretching and displacement to Ywhich the belts might be subjected.

2. In a high-draft mechanism the combination of an endless belt, a cylinder for actuating said belt, a guiding frame including lateral plates, and aV guiding member inserted through the iront curve of the said belt and consisting in a rod attached tolsaid lateral plates and a belt contacting rod articulated at its middle with said rod, said contacting rod adapted to oscillate to.

compensate for stretching and lateral displacement of the said belt.

3. In a high-draft mechanism for textile bres Y the combination of endless belts, cylinders for I sponding-recesses, ilxed .guide rods introduced into the front curve of the belts and fitting in the recesses insaid lateral plates, and belt engaging rods articulated to said guide rods and adapted to oscillate With respect to their normal position in order to compensate for thestretching and displacement to which the belts might be subjected.

5. In a high-draft mechanism for textile ilbres the combination of endless belts, cylinders for actuating said belts, a guiding frame, lateral plates in said frame, fixed guide rods in the front curve of the belts, and oscillatable belt engaging rods of U-shaped section articulated to the fixed rod to compensate for the stretching andl displacement to which the belts might be subjected.

6. In a high-draft mechanism for textile fibres the combination Yof endless belts, cylinders for actuating said belts, a guiding frame, lateral plates in said frame, fixed guide rods in the front curve of the belts, and oscillatable belt engaging rods of U-shaped section, said oscillatable rods positioned over the xed rods and having two slots in one side inclined in opposite directions, said xed rods having pins corresponding in position to said slots and adapted to i'lt into said slots, said oscillatable rods carrying lateral projections for comin'ginto contact with therbelts whereby a lateral displacement of a belt causes an oscillatable rod to slide laterally on said pins to compensate for the deviation of the belt.

7. In a high-draft mechanism for textile bres the combination of an endless belt, means for actuating said belt, a .guiding frame, lateral plates in the said frame, a fixedguide rod introduced into the front curve of the belt, and a belt engaging rod articulated to said guide rod and adapted to oscillate with respect to its normal position in order to compensate for the stretching and displacement to which the belt might be subjected.

8. In a high draft mechanism for textile fibres the combination of endless belts, cylinders for actuating said belts, a guide frame, lateral plates in said frame, fixed guide rods in the front curve of the belts, oscillatable belt engaging rods articulated to said xed guide rods for movement with respect to their normal position, discs mounted in the frame at the sides of the belts and adapted to be rotated by contact with the edge of a belt if the belt is laterally displaced, and connecting rods between the discs and the extremities of the oscillatable rods to move the latter in order to compensate for the stretching and displacement of the belts.

FERNANDO CASABLANCAS. 

